Conversion buffer overflow when saving updated XML to file

Question

<?xml version='1.0' encoding='ISO-8859-1' standalone='yes'?>
<Collection>
<Book Id='1' ISBN='1-100000ABC-200'>
<Title>Principle of Relativity</Title> 
</Book>
</Collection>

Whenever I want to save my updated XML file in the app directory which is /data/data/App17.App17/files an exception occurs which is

System.ArgumentException: Conversion buffer overflow.

Why does this exception is occur and how can I solve it?

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.IO;
using System.Reflection;
using Android.Content.Res;
using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace App17
{
[Activity(Label = "App17", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
    int count = 1;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);


        SetContentView(Resource.Layout.Main);
        var xml = XDocument.Load(Assets.Open("Q317664.xml"));
        var node = xml.Descendants("Book").FirstOrDefault(cd => cd.Attribute("Id").Value == "1");
        node.SetAttributeValue("ISBN", "new");

        string dir = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
        string path = Path.Combine(dir, "Q317664.xml");

       xml.Save(path);

Please provide us with the StackTrace – Jonas Köritz Apr 20 '16 at 13:16 — Jonas Köritz, Apr 20 '16 at 13:16

score 0 · Accepted Answer · answered Apr 20 '16 at 16:01

0

The problem is, that the File is not encoded in UTF-8. I assume, you have created it with Visual Studio > New File. This creates a file with a Windows Code page or some other encoding.

Open the File in VS and save it via File > Advanced Save Options and then select Unicode - Codepage 1200.

After you have done this, your code should run fine.

answered Apr 20 '16 at 16:01

Sven-Michael Stübe

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Stube Now i want to Add this updated Xml file in my Asset folder When application is running but keep the old one also please help me. – Asad Ahmad Apr 20 '16 at 17:43
You already asked this: http://stackoverflow.com/questions/36677276/unable-to-save-the-changes-in-xml-file – Sven-Michael Stübe Apr 20 '16 at 17:45
Stube now i want to Add this save XML file from app directory to Asset folder but keeps the old one XML file which is already present in Asset folder – Asad Ahmad Apr 20 '16 at 17:52
They already told you (multiple times) that the asset folder is read only. – Sven-Michael Stübe Apr 20 '16 at 17:54
Stube you are not getting my question i am saying that i updated the XML file and save that file in App directory OK Now i want to include that updated file in my Asset folder from App directory you got it or not. – Asad Ahmad Apr 20 '16 at 18:00
You can only change it if you rebuild and -deploy your app ;) – Sven-Michael Stübe Apr 20 '16 at 18:07

Conversion buffer overflow when saving updated XML to file

1 Answers1